Mednarodna podiplomska ²ola Joºefa Stefana, Ljubljana
Abstract
In this study, the influence of E-glass fiber and mineral filler content
on the microstructure, physical, mechanical and dielectric properties of Glass
Fiber Reinforced Composites (GFRC) was investigated. Five sets of GFRC,
based on polymer resin with varying E-grade glass fibers and CaCO3 mineral
filler weight fractions (15/64, 20/59, 25/54, 30/49, 35/44), were commercially
prepared. Test specimens were prepared by compression molding. Scanning
Electron Microscope images revealed that at higher concentrations, the fibers
clustered together, resulting in heterogeneous microstructures. Characterization
of the composites showed that glass fiber content and distribution significantly
affects the mechanical properties. The flexural strength of the composites
decreased with increasing glass fiber content. The dielectric constant ε`
decreased with increasing fiber content
